RG2012P-1211-C-T5 Equivalent & Substitute Parts

Part Overview

The RG2012P-1211-C-T5 is a 1.21 kOhms ±0.25% thin film chip resistor in 0805 (2012 Metric) package rated for 0.125W (1/8W) power dissipation. Manufactured by Susumu, this component features anti-sulfur coating and automotive AEC-Q200 qualification, suitable for high-reliability applications in temperature ranges from -55°C to 155°C. The part is currently obsolete, with 1,073 pieces available in stock. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Resistance	1.21 kOhms
Tolerance	±0.25%
Power Rating	0.125W (1/8W)
Package	0805 (2012 Metric)
Composition	Thin Film
Temperature Coefficient	±25ppm/°C
Operating Temperature Range	-55°C to 155°C
Features	Anti-Sulfur, Automotive AEC-Q200
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the RG2012P-1211-C-T5 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Resistance value: 1.21 kOhms (exact match required)
Package type: 0805 (2012 Metric) (exact match required)
Composition: Thin Film (exact match required)
Operating temperature range: -55°C to 155°C (minimum requirement)
Power rating: 0.125W minimum (equal or higher acceptable)
Automotive qualification: AEC-Q200 (for automotive applications)
RoHS compliance: ROHS3 Compliant

Flexible Parameters (Upgradeable):

Tolerance: ±0.25% or tighter (±0.1%, ±0.05%, ±0.02%)
Temperature coefficient: ±25ppm/°C or lower (±10ppm/°C, ±5ppm/°C)
Packaging format: Tape & Reel acceptable for obsolete part replacement

Substitute parts are grouped into two categories: Susumu RG series upgrades (same manufacturer, improved specifications) and direct cross-manufacturer alternatives (TE Connectivity and YAGEO equivalents).

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Temp Coeff (ppm/°C)	Package	Status	AEC-Q200
RG2012P-1211-C-T5	Susumu	1.21 kΩ	±0.25%	0.125	±25	0805	Obsolete	Yes
RG2012N-1211-B-T5	Susumu	1.21 kΩ	±0.1%	0.125	±10	0805	Active	Yes
RG2012N-1211-W-T1	Susumu	1.21 kΩ	±0.05%	0.125	±10	0805	Active	Yes
RG2012P-1211-B-T5	Susumu	1.21 kΩ	±0.1%	0.125	±25	0805	Active	Yes
RG2012P-1211-W-T5	Susumu	1.21 kΩ	±0.05%	0.125	±25	0805	Active	Yes
RG2012V-1211-B-T5	Susumu	1.21 kΩ	±0.1%	0.125	±5	0805	Active	Yes
RG2012V-1211-P-T1	Susumu	1.21 kΩ	±0.02%	0.125	±5	0805	Active	Yes
RG2012V-1211-W-T1	Susumu	1.21 kΩ	±0.05%	0.125	±5	0805	Active	Yes
RG2012V-1211-W-T5	Susumu	1.21 kΩ	±0.05%	0.125	±5	0805	Active	Yes
RP73PF2A1K21BTDF	TE Connectivity	1.21 kΩ	±0.1%	0.25	±25	0805	Active	No
RT0805CRD071K21L	YAGEO	1.21 kΩ	±0.25%	0.125	±25	0805	Active	No

Engineering Selection Recommendations

Primary Substitutes (Susumu RG Series - Same Manufacturer):

The RG2012P-1211-C-T5 can be directly replaced with active Susumu RG series parts maintaining identical electrical and mechanical specifications. RG2012P-1211-B-T5 provides improved tolerance (±0.1% vs ±0.25%) while retaining the same temperature coefficient and power rating. For applications requiring enhanced stability, RG2012V series parts offer superior temperature coefficient performance (±5ppm/°C vs ±25ppm/°C) with tolerance options ranging from ±0.1% to ±0.02%.

All Susumu RG series substitutes maintain AEC-Q200 automotive qualification, anti-sulfur coating, and ROHS3 compliance. These parts are available in active production status with substantial inventory levels.

Secondary Substitutes (Cross-Manufacturer Alternatives):

TE Connectivity RP73PF2A1K21BTDF provides equivalent resistance and tolerance specifications with increased power rating (0.25W vs 0.125W). This part does not carry AEC-Q200 qualification and is suitable for non-automotive applications requiring higher power dissipation capability.

YAGEO RT0805CRD071K21L matches the original part's tolerance (±0.25%), power rating (0.125W), and temperature coefficient (±25ppm/°C) specifications. This part is active in production and does not carry AEC-Q200 qualification. It is suitable for general-purpose applications where automotive qualification is not required.

Selection Criteria:

For automotive applications requiring AEC-Q200 compliance: Select from Susumu RG series substitutes
For improved tolerance and stability: RG2012V series (±5ppm/°C temperature coefficient)
For highest precision requirements: RG2012V-1211-P-T1 (±0.02% tolerance)
For non-automotive applications: TE Connectivity or YAGEO alternatives are acceptable

Frequently Asked Questions (FAQ)

Q: Can RG2012P-1211-B-T5 be used as a direct replacement for RG2012P-1211-C-T5?

A: Yes. Both parts share identical resistance (1.21 kOhms), power rating (0.125W), package (0805), temperature range (-55°C to 155°C), and AEC-Q200 qualification. RG2012P-1211-B-T5 provides improved tolerance (±0.1% vs ±0.25%), making it a superior substitute. The temperature coefficient remains ±25ppm/°C.

Q: What is the difference between RG2012P and RG2012V series?

A: The primary difference is temperature coefficient performance. RG2012P series has ±25ppm/°C, while RG2012V series has ±5ppm/°C. Both series maintain identical resistance, power rating, and package specifications. RG2012V is recommended for applications requiring enhanced thermal stability.

Q: Is RP73PF2A1K21BTDF compatible with RG2012P-1211-C-T5?

A: RP73PF2A1K21BTDF is mechanically and electrically compatible in terms of resistance value, package, and operating temperature range. However, it has higher power rating (0.25W vs 0.125W) and lacks AEC-Q200 automotive qualification. Use this part only in non-automotive applications or where higher power dissipation is beneficial.

Q: Can I use RT0805CRD071K21L in an automotive circuit?

A: RT0805CRD071K21L matches the original part's electrical specifications (1.21 kOhms ±0.25%, 0.125W, ±25ppm/°C) and package. However, it does not carry AEC-Q200 qualification. For automotive applications requiring AEC-Q200 compliance, use Susumu RG series substitutes instead.

Q: What does the tolerance specification mean for circuit performance?

A: Tolerance specifies the maximum deviation from the nominal resistance value. RG2012P-1211-C-T5 has ±0.25% tolerance, meaning the actual resistance can vary by up to 0.25% from 1.21 kOhms. Tighter tolerances (±0.1%, ±0.05%, ±0.02%) provide more precise resistance values, beneficial for precision analog circuits and calibration-sensitive applications.

Q: Are all substitute parts ROHS3 compliant?

A: All Susumu RG series substitutes are ROHS3 compliant. TE Connectivity RP73PF2A1K21BTDF and YAGEO RT0805CRD071K21L are also ROHS3 compliant. Verify compliance documentation for specific application requirements.

Q: What is the significance of the packaging format (Tape & Reel)?

A: Tape & Reel (TR) packaging is standard for automated assembly processes. The original RG2012P-1211-C-T5 uses standard packaging. All active substitute parts are available in Tape & Reel format, ensuring compatibility with standard pick-and-place equipment and manufacturing workflows.

Q: Can I substitute a higher power-rated resistor in place of the 0.125W part?

A: Yes. A 0.25W resistor (such as RP73PF2A1K21BTDF) can replace a 0.125W resistor in the same package. The higher power rating provides additional thermal margin. However, verify that the physical dimensions and height remain compatible with your PCB layout and assembly constraints.

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